(#1304) - Remove maintainer stuff from package.json
(#1278) - pass errors back from ajax requests
(#1308) - Support 'key' in allDocs()

Currently allDocs doesn't correctly support
the 'key' param.  This is reproducible
in all 3 local adapters and the remote
http adapter.  This fix adds 'key' support
plus some tests to verify it's working.